[rkpd] Move watchdog calls from rkpd_client to keystore2

This cl moves watchdog calls to keystore2 to make rkpd_client
less dependent on keystore2, this allows us to make rkpd_client
an independent library more easily later.

Test: atest keystore2_test
Bug: 241428146
Change-Id: Ic3040ad65356aa7e25d38f36d453a258caf28403
3 files changed